William Warraghiyagey Johnson was born in 1715. He arrived in New York in 1738 at the age of 23 from a farm near Dublin. He married a Mohawk girl, Degonwadoniti (known as Molly Brant), around 1757. He was 42, she was 21. It was a happy marriage, and they had seven children.
Sir William Johnson was a colonial British citizen who was adopted into the Iroquois nation and given the name "Warraghiyagey" which means "One who does much" With an army of colonial militia and Iroquois warriors, he defeated a French army at the Battle of Lake George and captured its commander, Baron Dieskau. This victory won Johnson a hereditary baronetcy, with the title of Sir. Johnson won further military laurels during the French and Indian War. In 1759 he led a large force of Iroquois warriors to accompany a British thrust against the French fort of Niagara. When the British commander, Brig. Gen. Brideaux was killed by an exploding cannon, Johnson assumed control. Under his leadership a large force of French militia and Indian warriors, who were attempting to relieve Niagara, were totally routed at the Battle of La Belle Famille. This defeat forced the French garrison to surrender, an act which severed the link between the French forts in West and Canada. By 1760 the conquest of Canada was completed when three British armies converged on Montreal. Prominent among these forces was a vast horde of Iroquois led by Johnson.